1 /**************************************************************************
3 * Copyright 2010-2011 VMware, Inc.
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
24 **************************************************************************/
38 #if defined(__linux__)
39 #include <linux/limits.h> // PATH_MAX
43 #include <sys/syslimits.h> // PATH_MAX
44 #include <mach-o/dyld.h>
48 #include <android/log.h>
52 #warning PATH_MAX undefined
57 #include "os_string.hpp"
67 size_t size = PATH_MAX;
68 char *buf = path.buf(size);
70 // http://stackoverflow.com/questions/1023306/finding-current-executables-path-without-proc-self-exe
73 if (_NSGetExecutablePath(buf, &len) != 0) {
80 len = readlink("/proc/self/exe", buf, size - 1);
82 // /proc/self/exe is not available on setuid processes, so fallback to
83 // /proc/self/cmdline.
84 int fd = open("/proc/self/cmdline", O_RDONLY);
86 len = read(fd, buf, size - 1);
91 snprintf(buf, size, "%i", (int)getpid());
104 size_t size = PATH_MAX;
105 char *buf = path.buf(size);
115 String::exists(void) const
120 err = stat(str(), &st);
125 if (!S_ISREG(st.st_mode))
131 int execute(char * const * args)
136 execvp(args[0], args);
137 fprintf(stderr, "error: failed to execute:");
138 for (unsigned i = 0; args[i]; ++i) {
139 fprintf(stderr, " %s", args[i]);
141 fprintf(stderr, "\n");
146 fprintf(stderr, "error: failed to fork\n");
151 waitpid(pid, &status, 0);
152 if (WIFEXITED(status)) {
153 ret = WEXITSTATUS(status);
154 } else if (WIFSIGNALED(status)) {
155 // match shell return code
156 ret = WTERMSIG(status) + 128;
164 static volatile bool logging = false;
167 log(const char *format, ...)
171 va_start(ap, format);
174 __android_log_vprint(ANDROID_LOG_DEBUG, "apitrace", format, ap);
176 vfprintf(stderr, format, ap);
182 #if defined(__APPLE__)
183 long long timeFrequency = 0LL;
193 static void (*gCallback)(void) = NULL;
195 #define NUM_SIGNALS 16
197 struct sigaction old_actions[NUM_SIGNALS];
202 * - http://sourceware.org/git/?p=glibc.git;a=blob;f=debug/segfault.c
203 * - http://ggi.cvs.sourceforge.net/viewvc/ggi/ggi-core/libgg/gg/cleanup.c?view=markup
206 signalHandler(int sig, siginfo_t *info, void *context)
209 * There are several signals that can happen when logging to stdout/stderr.
210 * For example, SIGPIPE will be emitted if stderr is a pipe with no
211 * readers. Therefore ignore any signal while logging by returning
212 * immediately, to prevent deadlocks.
218 static int recursion_count = 0;
220 log("apitrace: warning: caught signal %i\n", sig);
222 if (recursion_count) {
223 log("apitrace: warning: recursion handling signal %i\n", sig);
232 struct sigaction *old_action;
233 if (sig >= NUM_SIGNALS) {
234 /* This should never happen */
235 log("error: unexpected signal %i\n", sig);
238 old_action = &old_actions[sig];
240 if (old_action->sa_flags & SA_SIGINFO) {
241 // Handler is in sa_sigaction
242 old_action->sa_sigaction(sig, info, context);
244 if (old_action->sa_handler == SIG_DFL) {
245 log("apitrace: info: taking default action for signal %i\n", sig);
248 struct sigaction dfl_action;
249 dfl_action.sa_handler = SIG_DFL;
250 sigemptyset (&dfl_action.sa_mask);
251 dfl_action.sa_flags = 0;
252 sigaction(sig, &dfl_action, NULL);
258 } else if (old_action->sa_handler == SIG_IGN) {
261 /* dispatch to handler */
262 old_action->sa_handler(sig);
268 setExceptionCallback(void (*callback)(void))
272 gCallback = callback;
274 struct sigaction new_action;
275 new_action.sa_sigaction = signalHandler;
276 sigemptyset(&new_action.sa_mask);
277 new_action.sa_flags = SA_SIGINFO | SA_RESTART;
280 for (int sig = 1; sig < NUM_SIGNALS; ++sig) {
281 // SIGKILL and SIGSTOP can't be handled.
282 if (sig == SIGKILL || sig == SIGSTOP) {
287 * SIGPIPE can be emitted when writing to stderr that is redirected
288 * to a pipe without readers. It is also very unlikely to ocurr
289 * inside graphics APIs, and most applications where it can occur
290 * normally already ignore it. In summary, it is unlikely that a
291 * SIGPIPE will cause abnormal termination, which it is likely that
292 * intercepting here will cause problems, so simple don't intercept
295 if (sig == SIGPIPE) {
299 if (sigaction(sig, NULL, &old_actions[sig]) >= 0) {
300 sigaction(sig, &new_action, NULL);
307 resetExceptionCallback(void)